Ventilator



A. S. DOZIER.

Chimney Cowl.

Patented Dec. 21, 1852.

ITEI) STATES PATENT OFFICE.

A. S. DOZIER, OF NORFOLK, VIRGINIA.

VENTILATOR.

Specification of Letters Patent No. 9,481, dated December 21, 1852.

To all whom it may concern:

Be it known that I, A. S. DOZIER, of the town of Norfolk, in the county of Norfolk and State of Virginia, have invented a new and useful Improvement in Ventilators for Ventilating Public and Private Buildings, Ships, &c., and that the following is a full and exact description of the construction and operation of the same, reference being had to the annexed drawings, making part of this specification.

Figure 1, is a perspective view of the ventilator showing the slats or shutters on two sides open and those on two opposite closed and the valve of the trunk open. Fig. 2, is a vertical section of the ventilator showing the slats or shutters on one side open and those on the opposite side closed.

A is a polygonal dome, closed at the top and open at the bottom, and also open on its several sides, resting upon the top of a trunk B leading into a receiver C for receiving and confining the air, and from which the air is conveyed whenever desired, the aforesaid trunk having a hinged valve D, near the lower end thereof for shutting off the entrance of air to the receiver in cold or damp weather, or at any time required; and for opening the trunk to let off foul and warm air.

E are four sided frames to which the slats or shutters are hinged, secured to the several open sides of the dome.

F are the hinged slats or shutters bent inward at either end, forming lips which fit snugly against the sides of the frames, forming air tight joints.

G are the hinges or journal pins on which the slats or shutters move-said journal pins passing through ears at the upper corners of the slats or shutters and entering the sides of the aforesaid frame E.

H, are curved arms secured to the backs of the slats or shutters and to a bar or rod I to which a cord J is attached for drawing down the bar in order to open the slats or shutters.

K are radial wings radiating from the several angles of the dome between the slats or shutters for the purpose of directing the currents of air through the spaces between the slats or shutters.

L is a bell crank, to one end of which the valve D is affixed for opening or closing the trunk B, and to the opposite end a cord M, for drawing down the crank to raise the valve, which is closed when in a horizontal position.

This ventilator should be placed on the top of the building containing the apartments to be ventilated and from the receiver C there should extend conducting tubes to the several apartments to be ventilated, for admitting pure air and for discharging foul air. The weight of the slats or shutters F will cause them to hang in a vertical or closed position so that when it is required to open them it will be only necessary to draw down the bars I, to which the slats or shutters are aflixed by means of the cords J. When the slats or shutters of one or two sides are opened those on the opposite sides should be closed.

The weight of the valve D also has a tendency to keep it closed and will retain it in a horizontal position until raised by drawing on the line M. i

The valve D may be held at any required angle by means of the cord or line M, being secured to any convenient place. The red line shows the posit-ion of this valve when closed.

Having thus described my improved ven tilator and the method of operating the same, I wish it to be understood that I do not claim a ventilator with slats or shutters fixed in the sides of a cupola or dome, or other structure, placed on the top of the building, or elsewhere, but,

WVhat I do claim as my invention and desire to secure by Letters Patent, is

1. The arrangement of the frame E in the sides of the cupola or dome, projecting slightly beyond the face thereof, to admit the lips, or turned ends of the slats or shutters to lap over the same in order to form tight joints and the manner of hinging, or jointing the slats or shutters to the same by the oint pins G.

2. I likewise claim the radial wings K when combined with the frame of the dome or cupola for directing the currents of air to the spaces between the slats or shutters as described, and thence to the trunk.

In testimony whereof I have hereunto signed my name before two subscribing witnesses.

A. S. DOZIER.

Witnesses:

A. C. WATKINS, W. P. ELLIo'rr. 

